Can a parent's parenting time be suspended immediately if a children's aid society raises safety concerns?

A children's aid society itself cannot suspend a family court parenting order - only a court can change an existing order. But a society raising a serious safety concern can lead to parenting time being suspended quickly in practice, through a few different routes: the other parent can bring an urgent motion to the family court asking for an immediate change based on the concern; the protection court can make its own order, such as a temporary care and custody arrangement, that changes where the child actually stays regardless of what the family order says; or, in a genuine emergency, protective steps can be taken with a court application to follow quickly after.

What a society's concern doesn't do on its own is automatically override an existing order without any court involvement at all - someone still has to bring the matter to a judge, even if that happens on an urgent, same-day or next-day basis where the risk is serious. If you're facing a sudden safety concern being raised against you, get legal advice immediately, since the process moves quickly and being unrepresented at an urgent hearing can put you at a real disadvantage.